and 3m products are hard to trust. I'm doing some concrete repair at the plant and they have been having containment issues. they have some gasses over there that are odorless colorless and will kill u in about 5 seconds. and some of the gass leaked out on wed and we had to evacuate. and they mix chemicals in different tanks. the tank that had glue in it last week has hydrocloric acid this week. I say u stay away from any 3M products personally. but thats just my opinion.